formation with low walls, connected with the N.E. border by a ridge, and
with the N. border by a remarkable row of depressions, situated on a
mound; and beyond this object on the E. are three parallel clefts running
towards the N.E. On the W. will be found some of the clefts belonging to
the Goclenius rill-system. In the rugged region S.E. of the formation is
a peculiar low ring with a very uneven floor and a large central hill.
The E. wall of Guttemberg may be regarded as forming a portion of the
Pyrenees Mountains.

GOCLENIUS.--A ring-plain, about 28 miles in diameter, bearing much
resemblance to Plinius in form and size, and, like this formation,
associated with a fine system of clefts. The lofty rampart, tolerably
continuous on the W., is broken on the S.W. by a bright crater, and on
the N.W. by a remarkable triangular depression. It is also traversed by a
delicate valley extending from the crater on the S.W. to another on the
N.W. border; and at a point a little W. of the first crater is dislocated
by an intrusive mass of rock. There are several gaps on the E. and many
spurs and irregularities in outline both within and without. A great
portion of the N. wall is linear, and joins the E. section nearly at
right angles. West of the triangular depression it appears to be
partially wrecked, indications of the destruction being very evident if
it be observed when the E. wall is near the morning terminator. The small
bright central mountain is remarkable for its curious oblong shadow. Two
clefts traverse the interior of Goclenius. (1) Originates at the S. wall,
E. of the crater, and runs E. of the central mountain to the N. wall; (2)
crosses the _debris_ of the ruined N.W. border, runs parallel to the
first, and extends nearly to the centre of the floor, (1) Re-appears at
the foot of a mound outside the N. wall, and, after crossing the outer W.
slope of the great ring-plain on the N.W. wall of Guttemberg, runs to the
W. side of an oblong formation N. of it. There are two other clefts,
closely parallel and W. of this, traversing the Mare, and terminating
among the mountains on the N.W. These are crossed at right angles by what
appears to be a "fault," running in a N.W. direction from the W. side of
Guttemberg.

MACCLURE.--One of a curious group of formations situated in the Mare
Foecunditatis some distance S.W. of Goclenius. It is a bright ring-plain,
about 15 miles in diameter, with a narrow gap in the N.E. wall and a